Fuse-plug



` R. B. BENAMIN `AND E. G. K. ANDERSON.

FUSE PLUG.

APELICATION 'FLLED MAYl 2. |916.

. Patented Sept. 23, 1919.

2 SHEETS-SHEET l R. B. BENJAMIN AND E. G. K. ANDERSON.

FUSE-PLUG.

APPLICATION man MAY2.1915.

- Patented Sept. 23, 1919.

2 SHEETS-SHEET 2.

-. s'rATEs "PA-TENT orricii.

REUBEN is. l:BENJANIIN AND ERNST G. K. ANDERSON, or CHICAGO, ILLINOIS, AssIGNons To BENJAMIN ELECTRIC MANUFACTURING COMPANY, or. CiIICAGo, ILLINoIs,'A

CORPORATION ILLINOIS.-

rUsn-:PLUG

Be it knownth'at we, REUBEN '.B. *BENJAMIN and ERNs'n GL K. ANnERsoN-, 'both citizens of the .United `States, residing at. Chicago, in'

the" county ofCook. and v"State of Illinois',

have jointly' 'invented 'new and useful Irnprovenients-in Fuse-Plugs, 'ofwhich the following is, a full,l clear',- concise, and .exact description', reference being h ad to the ac .be ,simple in construction, eflicient in use and'feasy to manufacture.

`jfFurthe'r objects will appear from the de- .description to follow taken inA con-` with the appended claims.

neet; drawings, in which we` have shown two odiments of our-invention; .25

e 1 is an axial section of the fuse plus.: f

Fig. 21s transverse *sectionl on the line 2-2 of Fig. 1;'

Fig.' 3 is ay transverse .section ,on the line 3 3 of Fig. 1;

Fig'. l is a plan view of a disk or washer for engaging the ends of the fuses; i

Fig. 5 is a side elevation oit' another forni of magazine fuse plug embodying our invention; y

-Fig. 6 is an axial section of the plug shown infFig.` 5, substantially on .the line 6-6 of Fig. 8; Fig. 7 is a section on the line 7-7 of Fv. 6

FigS is a section on the line 8--8 of Fig. 6.;

` Fig. 9 vis a section on the line 9-9 of Fis- G;

Fig. 10 is a side elevation of the insulating base;

shell Contact; and l Fig. 12 is a' detail view of a grooved disk with the` fuses engaged.

Referring now7 to the 'drawing 'in detail,

. and rst to Figs. 1 vto 5 inclusive, the plug here shown comprises an insulating base 10,

shell and center contacts.' '113 and 12 support-y spnican'on' of 'Letters Patent. "Patented Sept; 23,l 1919 ppiication mean-ay 2'. i916.' serial No. 94,864.

ed by '1 the insulating base, a. plurality of fuses 13 also supported -by the insulating base, a `closure member 14 which inaybe of4 mica for preventing theesc'ape of the'burnt gases, a retaining ring or cap lvfor holding the closure 1/1 Iin 'pos1t1on, an insulating sleeve 152? surrounding vthe/outer end of the shell contact-for insulating the shell Contact, froin'the retaining ring 15, and a closure member 16 which may be ,of mica located in the inner end of the plug to hinder the es` cape of the burnt gases.'

' The bent over ends 16a of the lfuses 13 are clamped betweenan eyelet 17 and a grooved disk'18. -The center contact '.12 extends' through the eyelet 17 and grooved disk 18 and has its o'uter end flanged over to firmly Clamp the fuseends 16a` between the eyelet 17 and grooved disk.k The eyelet 17 also serves to hold the vmicav disk or closure 16 in` place. The insulating'base 10 has a plurality' of recesses or grooves 27 in its side for engagement with the spring tongues 20 secured to the shell Contact 11 which may be formed integral therewith. The fuses. `13 are located in passages 21 in the insulating' base and their outer ends extend through eyelets 23 to which 'they are secured by be ing s'waged over as indicated at 24. v The shell Contact 11 has a 'tongue 25 'formed `integral therewith which .extends 'inwardly rin position to be engaged bythe eyelets 23 and the ends of the fuse's13. The retaining ring 15 has Va flange port-ion 28 integral therewith which is beaded over a corresponding bead 29 on the shell Contact.

The circuit through the plug is from the shell Contact' 11 through the contact tongue -S25. fuse 13 and eyelet 17 to the center contact 12. Vlf'hen one of the fuses has blown and it is desired to `b-ring a new fuse in po sition theinsulating base 10 is withdrawn from the shell contact 11 until the tongue 2O is 'out of engagement withthe groove 19.-

The base 10 is then rotated with respect to the shell until another one-of the grooves 19 Fig. 11 is a detail. view of part of the is in position to receive the tongue 20. The base is then pushed into the shell until `the be determined by inspection which of the fuses have been blown.j

The plug "shown in Figs. 5to 12', inclusive,

comprisesan'insulating'base 30,21. shell @011.

tact 31 surrounding .the base 30 and supported thereby, a centerfcontact`32 prefer- ,ably asheet metal eyelet, and a plurality of. Vfuses 33electrically connected to the center Contact 32. to be successively brought into electrical connection With the shell con-H tact 31.

The base 30 .is provided with `a pluralityof longitudinally extending grooves 34. in which the fuses 33 extend. To prevent short circuitiiig between the fuses andthe shell c ontact an insulating sleeve 35 is provided -Which closely surrounds the base 30 2 and covers the 'grooves 34. To position this sleeve 35 on the base the latteris provided with a shoulder 36V With -Which the lower edge of the sleeve engages'. The grooves 34 extend somewhat below the .sleeve 3-5 and thusprovide passage. for thel escape of thel gases fromthe grooves to the space between thev shell contact 31 and the sleeve 35 of the base 30. The grooves 34 are also in coml munication with a central recess 36 in-the 4base 30 through openings 36"L providing still 'another passage for the escape .of the burnt gases. The upper ends vof all the lgrooves 34 are closed by an insulating disk 37. vTo hold thedisk 37 in place andto electrically connect the fuses with the center contact a grooved plate 38I andaeyele't 39 are provided `between which the vfuses' are clamped. The plate is provided with radial grooves 40 (Fig. 12) in lwhich thel bent over ends 41 of the fuses lie. The eyelet 39 is provided with flanges 42 and 43 which embrace the inner .edge of the disk'37. The lower ends of' the fuses are connected with metal eyelets 44 which eyelets are secured in openings in thebase 30.

To make the electrical connection With the I fuses 33 the shell contact 31`is,provided with an inwardly extending Contact piece 45 which is located ,in position to be successively engaged by the eyelets 44 to which the fuses are electrically-and mechanicallyv con'- nected. To properly position the base 30 Withy respect to the shell 31 thebase. is provided with. a-plurality of grooves or recesses 46 to receive a lug 47 (Figs. 7 and 11) struck up from 'the shell contact. To retain the base 30 "Within the shell 31 the shell is provided With a pair of spring fingers 48 struck up from the material -of the shell for engagement Withl the recesses 46 in the base 30. These' lingers' 'will prevent the base from dropping out ofthe shell but Will permit the base to be readily Withdrawn when desired.

T0 prevent the escape of the burnt gases at the outer end of the plug an insulating disk 49 extends across the base 30 and is held in place by means of a metal cap 50 provided ifa,

' with a fiange 51 .which is beaded over a corresponding bead 52`-on the shell 31. sleeve i53- cfgfiber or other suitable insulating maiiaeri terial is provided between the shell 31UandI the iiange 51 and this sleeve 53 alsoextends v inwardly up to the'threaded portion of the shell 31 to prevent accidental contact with the charged parts when the plug is screwed into a receptacle. f,

The use of this plugis sub'stantially the same as that of the form shown in Figs'. 1', 2, 3 and 4. The circuit is from the center Contact 32 thrrough the eyelet 39 and through.

the*y plate '40 to one or" the' fuses 33l and through' the contact piece 4 to theshell con tact 31. Afterfa fuse has been blown the -I )lug is unscrewed from the receptacle and -the base 30 is partly Withdrawn from the shell contact 31 and rotated'to bringa new fuse into position to vregister with the contact piece`45. The. base4 30 is then slipped 'back into the vshell 31 to bring the fuse into electrical connection with the shell contact.

To determine which of the fuses' have been blown, 'all that is necessary is to screw the plug out of thereceptacle and Withdraw thel base 30 from the shell 31, when the con-v dition of the fuses can be determined by inspection, .through-'the openings below the sleeve 35.

base, said base being movable With respect to said .shell to successively ring said fuses into electrical connection vWith said shell contact, and an insulating disk closure ex-4 tending across one end of said vinsulating `base and one end of said shell contact, said i shell contact having a bead thereon and means for securing said closure to said shell contact comprising a cap having a Harige beaded over said first bead. v

2. 'A magazine fuse plug comprising an -i insulating base, a plurality of fuses support-@ ed thereby, a shell `contact surrounding said base, saidbase being movable with respect to said shell to lsuccessively bring 4said fuses into electrical connection With said slll-I contact, and 'an insulating disk` closure eX- tending. across. one end of said insulating base and one end of said Shell Contact andv secured to said shell contact, and a ythin insulating sleeve immediately surrounding the endet said shell contact adjacent said disk closure.

3. A. magazine fuse plug comprising a threaded 'shell contact, an insulating base, a

plurality of fuses supported thereby, a cap I closing the outer end of the fuse plug, said base being insertible Within said shell contact from the inner end of the fuse blug and being movable with respect to said shell to successively bring said fuses into electrical I connection with said shell vcontact, -and spring means-for holding said base in said shell comprising a spring tongue extending substantially parallel to the axis of the fuse plus, i

4. A magazine #fuse plug comprising a threadedl shell contact, antinsulating base, a plurality of fuses supported thereby, a cap closing the outer end ofthe fuse- .plug, said "base being insertible within said shell con-` tact from the inner end of the fuse plug being movable with respect-to said shell to successively bring said fuses into electrical connection vwith said shell contact, .and spring means for holding said -base'in said shell comprising a spring tongue extending substantially parallel to the axis of the fuse plug and'\ secured to said shell contact, said base having a plurality of grooves extending substantially parallel `to the axis of the fuse plug with any one ot' which said spring tongue may engage.

5. A magazine fuse plug comprising anvl insulating base, a plurality of fuses supported thereby, and means for securingthe ends of said fuses comprising a in etal disk hav' ing a plurality of ing from a common center to receive the ends ofy saidfuses,.sa1d disklhaving a central opening therein, and acenter contact member extending through said opening and secured to said base and electrically connected with said disk.

`6. A magazine fuse plug comprising a substantially cylindrical insulating base having .a plurality of-longitudinally extending grooves, fuses extending longitudinally 'of said grooves,` an insulating sleeve surrounding said base for covering said grooves, an

insulating fdisk extending across the side of said base for closing the ends of said grooves,

at the inner end of said base,

and an eyelet for securing said disk to said base and serving 'as an electric contact.

7. A magazine fuse plug comprisingl an insulating base, a center contact supported a shell contact surrounding said-base, a conductor electending inwardly connected to said shell contact exat the outer end of the base, a plurality of fuses electrically connected to said center contact and movable successively into electrical connection with trically vsaid conductor, and a thin insulating disk closure extending across the outer end of .said base and secured to said shell contact.

8. A magazine fuse plug comprising an insulating base. a center contact supported at the inner end of said4 base, a shell contact surrounding said base, a conductor electrically connected to said shell contact extendinc; inwardly at the outer end of the base, a

grooves therein radiat-M' plurality of fuses electrically connected to said center contact vand movable successively into electrical connection withsaid conductoi', and a thin insulating disk closure extending across .the outer end of saidbase,

and means for securing lsaid disk to said' shell contact comprising ya :cap inclos'ing Said disk andseciired to said 4shell contact.v

9..A magazine fuse plugcomprising an insulating base, a center contact supported at the 'innerend of said base, a shell conately surrounding the end of the shell contact for nsulatingid/cap from said shell contactf/V lj A 10. A magazine fuse plug comprising an insulating base, a center contact supported at the inner end of said base, a shell contact surrounding said base, a conductorelectrically connected tol said shell contact extending inwardly at' the outer end -of the base, a plurality of fuses electrically connected to said `centercontact and movable successively Y int-o electrical connection with said conductor, and a thin insulating disk closure extending across theouter end of said base, means for securing said disk to said shell contact comprising a cap inc losing said disk and secured to said shell contact, andjanins sulating sleeve immediately surrounding the end of the-shell contact for insulating said capl from said shell contact, said sleeve also extending inwardly far enough to prevent accidental contact'to lsaid shell contact when the plug is inserted 'in a receptacle.

' 11. A magazine fuse plug comprising ani insulatingbase having a plurality of lungi tudinally extending passages, fuses extend ing longitudinally vof said passages, an inv sulating sleeve` surrounding said .base forcovering said passages, an insulatingV diskextending across the end of said base for closing the ends ofsaid passages,and center contact'means for securing said disk to said base.

In witness whereof, we have hereunto subscribed our names. v

REUBEN VB. BENJAMIN; ERNST G. K. ANDERSON. 

